Founding-pattern.



D. BOURQUE.

FDUNDING PATTERN.

APPLICATION man lunl 11.11916.

1,287,625. Patented Dec. 17, 1918.

Figi. 3

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@MC2-.111; Q Q Q /7 @En @Q @sa Q@ UNITED f DAVID nounou-E, or AMESBURY, MASSACHUSTTS", Assieivon To ke.. WLiMRrY ce..

n jectof the Kingof Great Britain,

or MERRIMAC, MASSACHUSETTS, A CORPORATION or'ivins'SAcnUsnTTs. i

' FoUNnING-PATTERNj To all whom'z' may concern.'y l y; n A, y

Be it known that I, Devin Bomann, a suband a resident of Rocky jHill, Amesbury, in the county of Essex vand Commonwealth of Massachusetts, have invented an Improvement in Founding-Patterns, ofwhich the following .descriptlom in connection with the accompanymgv drawings, isl a specication, like characters on the drawings representing like parte,`

This invention ,relates to foundry patterns for making molds for castings. Y One aim of the invention is to provide a 4pattern by the use of which a mold can be easily and quickly madefrom which castings cannbe produced withl the tively relative position. My invention visparticularly applicable to the production of small castings such as the heads or buttons of curtain fasteners ofthe kind shown in the patent to Mnrphy,.No. .853,206.' To 'illustrate my invention I have herein'shown an eme bodime'nt thereofadap-ted to be used in making such buttons orheads. l

yMy invention will be best understood by referenceto the following description, taken in connection Vwith the accompanying drawings, wherein: g

Figure 1 is a top plan view of aportion of one formofspatternconstructed in accordance with my invention;

Fig. 2 isajbottom plan thereof;

Fig. 3 is a Vsection on line 3 3 of Fig. 2,

on a larger scale;

Fig. 4 is a section showing how the mold is formed; the longer dimension of the plate 3 in this figure is on a vertical line as regards Figs. `1 and 2, but the scale is larger than in those two figures:

Fig. 5 is a plan lview of taken from the mold;

Fig. 6 is a section on line 6 6 and Fig. 7 is a view of one of the buttons as cut from the casting.

First describing the pattern in a general way and referring particularly to Figs. 1, 2- and 4, I have shown a pattern comprising a body plate 3 of a size substantially that of the cope 5 and ydrag 7 of the flask, as shown in Fig. 4. One side of this plate may be provided with a projecting ingateforming portion 9 and with projections 11 the casting as of Fig. 5

parts thereof that formed respec-A in the copek and. the` ldrag in .y perfect Specication of Letters'Patent.` v Patented Dec/.ffl Appncation filed July 171, 191e. A srialNo. 108,696.y Y

tol n form the lmain runners, "from which; branch the Subsldiary runner or Spray-formj suitable points along the runners Y13 mating projections I15v and17 extend` `on oppositesides of theplate,

and these projections are complementaryand conjointly `have the form ofthe desired casting., Referringto Fig. 7 4it will be observed y that one part lat one Side of line a-a 'of thecasting corresponds in shape and size to the projection `15, `and theremaining portion 17L onthe 'other sfide' ofthe line correspondsl to the projection 17.

To form a mold/the body plat-,Ie 3 islas-i:

sembledwith the cope 5` anddrag 7 as shown inliig.` 4, Sand 19 `is supplied and suitably pressed in place. VIt will bey apparentthat whenthe parts ofthe flask are reassembled without the plate a mold will be formed having recesses corresponding ,toY the various projections from, the plate and that the.

thickness ofthe plate itself will not affect its formthe surfaces of the sand 19. which come in'. contact with the opposite faces of the plate in Fig. Y4 coming togetherpat the parting of the mold. That is, the form of thecasting takenV from the mold `is the same as that of the pattern with the plate 3` re-r` duced virrthickness to the vanishing point. and,` ofcourse, with an.y ordinary :sink-head on -the part' 9a. Y

By reference to Fig. 3 it will be seen that I prefer to make one of the complementary projections that Ygo up to make the finished casting (shown in Fig. 6), Such as the part 15, of considerably greater depth than the other part 17. Preferably also I arrange the projections of alternate sprays 13 along the runners 11 oppositelyso that, longitudinally? of the runner a deep major part 15 succeeds a shallow minor part 17, and so on. By this arrangement deep matrices closely adjacent each other, and separated by thin walls of sand, are avoided and the matrices can be placed much more closely together in the mold, and the output of completed castings considerably increased. The arrangement isshown necessarily exaggerated in proportion, in Fig. 4.

It will be apparent that if perfect castings are to be produced, it is important that the same numerals complementary projections be exactly alhined For example, inthe case Vof'thebu-ttolisuch" as is shownin Fig. 7 the rear part-17a is curved transversely on the arc of a circle and depressed centrally as at 21? topermit a' holeto be'easilyV drilled therein. It is important that the flattenedv portion be14 cen*- tered and that the curved back be symmetrical as regards the body of thefbiitton.` To insure the proper positioning of' the'p1-"ejec-y tions 15 and 17 and also to simplifythe-construction of the pattern, I utilize f' asia1r guide holes 27 extending through the plate Sfivhichl may readily be cut perpendicularly to the surface thereof. Preferably, I' forn theip'rojections as the endl portions of s'ep'auajtet mein'- bers 23 (SeeFig. 3)' havingan intermediate' portion 25`of a" length equalto theftlickn'es'sf of thel plate 3; The' member 23? may be'inserted inan aperture `2'1"formed'in pl'ateB which is shaped to receiveE snuglyfthe` inter'- mediate portionl 25. It is obviousitlnit-the endk portionsl 155 a`nd11f7 projecting from* the faces of the plate will 'be in perfect alinement and as themembers 23lc'a1i befeasily constructed With accuracy thev completed casting Will have" the proper contour. In fact', the entireprocess of (':onstf'ructinigr` the pattern is simplified and cheapenedf.

The parts 9', l1 aiidf lwhichl forin'respectively the ingat'e or basin, tlie maiir runner and the sprays, may, if desired, be constructed as shown of suitably" formed pieces secured in any'suitable manner tio tlie'platel I have hereinv described the particular forni of pattern illustra-tedv in the drawing in detail, and have used specific Wordsin re'' feriing to the" various parts thereof,b'ut` it Will be understood that my purposefin so d'o` derstanding of the illustrative embodiment of my invention herein disclosed Yand not be,-V cause the details ofv construction and appli? tion projecting' fromone s'id'e-o'f' the platey in formv likea'- major part of thev des'nedn casting* and ,a minor' endportion projecting from the other side of'tfhepl'ate in "for'mf like the complementary part of the casting, said major portionsl being distributed substantiall in alternation 'onA opposite sides ofthe" plate whereby the matrices may" lie/nearer together intliemo'ltlf.

2. A pattern for forming molds for Cast-` ing' articles'l comprising a plate having'pairs of opposed projections oir -t'lie sides `f thereof,

the elements of eachlp'air being directly op posite each other and on opositev sidesof the plat'egone element 'being' in form like'y a 'ma-l jor pan of are desired casting mi uis-@ulelikev thecomplementary minorpart, said major' portions beingJ distributed: substar'itially'l in'Y alternation on: opposite sides oflth'eplatle whereby the matrices may Abe nearer toL- gether in the mol'd. i

3". 'patt'ern for forming molds-for caste projections from' a facek 1n form like a major portion of the desiredl 1 g articles having thereof, certain of said nrojectionsbe'liig casting' andy others'lilc'e the complementary mmol-portion, proJe'tions of diiferent character being disposedA inv alternation.

In testimony whereof, I have' signed my' nanieto this specification'.

- envio' enuncian.

Copiesof this-'patent may be? obtained fox-'f v ccts each, by addressing the Commissioner of' Patents,

WSliiliton; D. G. 

